thanks for your replies guys. i plan to insulate my grow hut in the attic. the grow hut will be 1.2x1.2x2m out of mdf then insulate all around the outside with 50mm polystyrene finishing off with another layer of 6mm mdf. im hoping this will keep the heat out during summer and keep heat in during the winter. i plan to have 125mm carbon filter and rvk fan to keep things cool during the summer and an air conditioning unit if needed can be sourced. a thermostat heater will keep things warm during the night in winter. i will use a home made flood and drain system for 6 plants.

What do you think guys will this work? i have grown before but never in the attic and it has taken me weeks to put the above together. any help will be greatly appreciated